Q100 The following data refers to a test on a single-cylinder four-stroke oil engineCylinder bore 220 mm; stroke 360 mm; area of indicator diagram 360mm ²;length of diagram 40mm; indicator spring rating = 1.25 mm/bar; Speed 300 rev/minbrake load 441.3 N at 0.9m radius; fuel consumption 3.8 Kg/hr; Calorific valueof fuel 43124 kj/kg; Cooling water flow 3.8kg/hr; rise in temperature of coolingwater 48K; and specific heat capacity of water 4.1868 kj lkg. k. god valamilyCalculate: @the mechanical efficiency the indicated thermal efficiency loThe heat balance sheet expressed as kj/min andas percentage of the heatsupplied to the engine.

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Answered: Q100 The following data refers to a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Q1. During a test on a two stroke diesel engine on full load the following observations were recorded: Speed= 350 rpm Net brake load= 590 N Mean effective pressure= 2.8 bar Fuel consumption=4.3 kg/h_ Jacket cooling water= 500 kg/h Temperature of jacket water at inlet and outlet=25°C and Soyc respectively Air used per kg of fuel= 33kg Temperature of air in test room= 25°C Temperature of exhaust gases= 400°c Cylinder diameter= 220 mm In solve to find mass of steam in exhaust gases m=(4.3/3600) *0.15 *9 Stroke length= 280 mm want clarification of the value 9 bleas Effective brake diameter= 1 m Calorific value= 43900 KJ/kg Proportion of hydrogen in fuel= 15% Mean specific heat of dry exhaust gases= 1.0 KI/kg K Specific heat of steam= 2.09 KJ/kg K Calculate: (1) indicated power (2) brake power (3) draw up heat balance sheel on minute basis.
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The following data refers for the single cylinder 4 stroke diesel engine. The brake power is 73 kW and engine speed is 500 rpm. The break mean effective pressure is 8 bar and mechanical efficiency is 80 %. The BSFC of the engine is .30 kg/kWhr of the fuel calorific value of 43200 kJ/kg. Determine indicated thermal efficiency.
9 A full load test on a two-stroke engine yielded the following results: speed 440 rpm; brake load 50 kg; imep 3 bar; fuel consumption 5.4 kg/h; rise in jacket water temperature 36 °C; jacket water flow 440 kg/h; air-fuel ratio by mass 30; temperature of exhaust gas 350 °C; temperature of the test room 17 °C; baromet ric pressure 76 cm of Hg: cylinder diameter 22 cm; stroke 25 cm: brake diameter 1.2 m; calorific value of fuel is 43 M.J/kg; proportion of hydrogen by mass in the fuel 15%: R 0.287 k.J/kg of mean specific heat of dry exhaust gases 1 kJ /kg K; specific heat of dry steam 2 kJ/kg K. Assume enthalpy of super heated steam to be 3180 k.J/kg. Determine. (i) the indicated thermal efficiency (ii) the specific fuel consumption in g/kW h (iii) volumetric efficiency based on atmospheric conditions Draw up a heat balance for the test on the percentage basis indicating the balance. the content of cach item
As a mechanical engineer, you were asked by your supervisor to monitor the operation of 4-stroke engine; as a result you got the following readings: > Imep = 780 kN/ m2 > Engine speed = 800 rpm > Brake Power 30 kW %3D %3D > nm = 85 % > B/S 0.7 You noticed also, that the inlet valve opens 10° before TDC and closes40° after BDC and it takes 0.0035 second after ignition for the charge to gain maximum pressure. Depending on the above readings, find the following engine parameters: a. The crank angle when the spark occursfor the maximum pressure to be at TDC b. The time period in second of inlet valve opening during one cycle c. The diameter of the engine d. The average piston speed 1 Upload file
A crawler with 1.5 m diesel engine has the following information: Cost of equipment Shipping cost Unkoading &assembling at destination Engine Crankcase capacity 1lours between oil changes Operating factor Useful life, with no salvage value Hours operated per year Weight Cost of fuel per liter Cost of oil per liter Maintenance $82260 $2448 $220 160 hp 22.71 liter 100 hr 06 6 vears 2000 61700 kg 0.33 $/liter 0.53 S/liter 100% of Depreciation 12% of Average Valuc Investment 1- what is the initial capital cost of the crawler?
1 The following observations are recorded during a test on a four-stroke petro engine, F.C = 25cc of fuel in 10 sec, speed of the engine is 2600 rpm, B.P = 22 kW, Qair 0.00134 m, piston diameter 90 mm, density of the fuel = 0.85gm/cc , compression ratio = 7.5, CV of fuel = 42000KJ/Kg, room temperature = 24 °C %3D = 140mm, stroke length = %3D %3D %3D 2 A six-cylinder 4-stroke cycle petrol engine is to be designed to develop 250 kW of (b.p) at 2200 rpm the stroke / bore ratio is to be 1.3:1. Assuming nm =80% and an indicated mean effective pressure of 9.5 bar, determine the required bore and stroke. If the compression ratio of the engine is to be 7.5 to 1, determine consumption of petrol in kg/h and in kg/bp.hr. Take the ratio of the indicated thermal efficiency of the engine to that of the constant volume air standard cycle as 0.65 and the calorific value of the petrol as; 44770KJ/kg.
Q9: In a test on a two- stroke, heavy oil, marine engine, the following observations were made, Oil consumption, 4.05 kg; Calorific value of oil, 43000 kj/kg; het brake load 579N; Mean brake diameter, 1 m; mean effective pressure 275 kN/ m2; Cylinder diameter 0.20m; stroke, 0.250m; speed, 360 rpm. Icalculate o @ the mechanical efficiency the indicated thermal efficiency O Ihe brake thermal efficiency and The quantity of jacket water required per minute if 30% of the energy supplied by the fuel is absorbed by this waterPermissible rise in temperature is 20k and specific heat capacity of water=4.1868
03/ A 4 cylinder has a following data Bore%3D15 cm; Piston speed 510 m/min; B.P= 60 kW; nech0.80; P=5 bar; C.V=D40000KJ/kg. Calculate i) whether this is 2 Stroke engine and why? or 4. Stroke
A full load test on a two-stroke engine yielded the following results: speed 440 rpm; brake load 50 kg; imep 3 bar; fuel consumpt ion 5.4 kg /h; rise in jacket water temperat ure 36 °C; jacket water flow 440 kg /h; air-fuel ratio by mass 30; temper ature of exhaust gaa 350 °C; temperature of the test room 17 °C; baromet ric pressure 76 cm of Hg cylinder diameter 22 cm; stroke 25 cm; brake diameter 1.2 m; calorific value of fuel is 43 M.J /kg; propor tion of hydrogen by maas in the fuel 15%; R 1 kJ /kg K; specific heat of dry steam 2 k.J/kg K. Assume enthalpy of super heated steam to be 3180 kl/kg. Determine, 0.287 k.J/kg of mean specific heat of dry exhaust gases = %3D (i) the indicated ther mal efficiency (ii) the specific fuel consumption in g/kW h (iii) volumetric efficiency based on atmoepher ic condit ions Draw up a heat balance for the test on the percentage basis indicat ing the content of each item in the balance.
1.3 During the trial of a single acting oil engine, cylinder diameter is 20 cm, stroke 28 cm, working on two stroke cycle and firing every cycle, the following observations were made: Duration of trial :1 hour :4.22 kg :44670 kJ/kg Total fuel used Calorific value Proportion of hydrogen in fuel : 15% Total number of revolutions :21000 Mean effective pressure : 2.74 bar Net brake load applied to a drum of 100 cm diameter : 600 N Total mass of cooling water circulated : 495 kg Total mass of cooling water 13°C, outlet 38°C : inlet Air used : 135 kg : 20°C Temperature of air in test room Temperature of exhaust gases 370°C Assume Cp, gases = 1.005 kJ/kg K, Cp, steam at atmospheric pressure = 2.093 kJ/kg K Calculate thermal efficiency and draw up the heat balance.
Engine Type Four cylinder Four stroke Diesel engine, Bore: 0.073m, Stroke: 0.0889m Capacity: 1489cc, Power: 36 H.P. at 4000 rpm, Torque : 8.5 kg.m at 2250 rpm and Compression Ratio :17.3:1 Explain how to measure the :- (i) Fuel consumption. (ii) (iii) RPM, power output etc. (iv) Study of various components of diesel engine. Manometer readings for air flow.

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